Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ac6fff4abc5de4…

MALICIOUS

PDF

33.7 KB Created: 2020-11-06 02:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 22ff4326b645f831a2c5e7d7525e5a23 SHA-1: 5b6cf50ac5e375e6635f926f7673d0a97d349051 SHA-256: 42ac6fff4abc5de408218f427f58e26e600412df3dc8d0a0fc991a960a448d34
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a search query for 'riddick full movie 123'. This suggests a lure to a malicious website, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffe.ru/aws?keyword=riddick+full+movie+123 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fa2bf6bd1e71.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/e1b2587.pdfIn PDF document text
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/vopuwubuwo.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/ceaf0127784.pdfIn PDF document text
    • https://wazuwivanesigov.weebly.com/uploads/1/3/4/4/134431766/a5eb6.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/xixofinerezexix.pdfIn PDF document text
    • https://dojumavuj.weebly.com/uploads/1/3/3/9/133997280/9357642.pdfIn PDF document text
    • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/xezumativutedak_majafabane_zoziko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f8e5dcf7fb9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/10261736580.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/maxetena.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4535 5164 bytes
SHA-256: 2b728f8cb60c287715c6c4f4a54bc4ea17139cdb45681e5fd7ed094a02748a43
font_01_sfnt_off000056d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D7 10424 bytes
SHA-256: 23d578c496cefdfae88235ca3c2e606384baffbed90ca30d0d798cb1607a586e